Rule 34 Dev - animal_genitalia animal_penis anus backsack balls blue_eyes canid canine canine_penis canis domestic_dog erection feral fur furry furry_only genitals grey_body grey_fur hi_res knot looking_at_viewer looking_back looking_back_at_viewer male male_only mammal pawpads paws penis penis_backwards presenting presenting_anus presenting_hindquarters sabuky simple_background solo tail|6499218552